#!/usr/bin/env python3

import numpy as np
import cv2 as cv
from matplotlib import pyplot as plt

img = cv.imread("../pic/7.png", cv.IMREAD_GRAYSCALE)
r1 = cv.Canny(img, 128, 200)
r2 = cv.Canny(img, 32, 128)

cv.imshow("original", img)
cv.imshow("result1", r1)
cv.imshow("result2", r2)

cv.waitKey()
cv.destroyAllWindows()
